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The actual amount of water vapor in a mixture of air and water is

In a hovering helicopter equipped with a tail rotor, directional control is maintained by

If the pressure of a dry gas is reduced by one third, the volume will

The emission of energy from the surface of all bodies is

When a weight on a string is spun around and the string is released, the weight travels

Pressure referenced from zero pressure is

Take right to be the positive direction for this question.  A car is moving to the left at decreasing speed.  What are the signs of the car’s velocity and acceleration?

  In the above image, when is the object moving in the negative direction at decreasing speed?

[Be sure to show all work.  When doing calculations, start with the symbolic equation(s) from the equation sheet, written down just as they are on the equation sheet and then progressing from there to a solution.] A plane lands on a runway and travels for 1.50 s at a constant speed of 88.0 m/s before the pilot begins to slow the plane down at a constant rate of 5.00 m/s2.  a) Draw a motion diagram that represents all of the plane’s time on the runway.  [You will upload this at the end of the exam.] b) Will the plane still be moving when it gets to the end of the 800-m long runway? [Enter your answer below and upload your written out calculations and explanation after the exam.] c) If the plane is still moving at the end of the runway, calculate what the minimum acceleration would need to have been to get the plane to stop in time.  If the plane was not moving at the end of the runway, calculate how much extra runway space it had. [Enter your answer below and upload your written out calculations after the exam.]

A stroller is moving to the left at 1.75 m/s.  The stroller speeds up to a speed of 3.25 m/s in 2.50 s.  a) Draw a motion diagram for this scenario. Include a coordinate system. [Draw this on blank paper (or a problem-solving template) and upload it immediately following the exam.] b) What is the acceleration of the stroller? [Enter your answer, with units, in the space below; show your work on paper, and upload it immediately following the exam.]